Scraper



Aug. 1o, 1937.

A.(l CXDX SCRAPER Filed NOV. 5, 1936 2 Sheets-Sheet l e//v//e/f/a/f dax @M4 M VM @b/Wg!! Aug. 1o, 1937. A. C. COX g 2,089,539

SCRAPER Filed NOV. 3, 1956 2 Sheets-Sheet 2 n Annu--- Patented ug. 10, 1937 UNITED STATES PATENT OFFICE 6 Claims.

The object of my invention is to provide a` A scraper of the type in which there is a central bowl with a bottom and side walls, which central bowl is arranged to cooperate with relatively fixed front and rear walls supported on a frame and preferably mounted on a carriage.

It is also an important part of my present invention to provide in such a structure as that just described a peculiar means for mounting the bowl for movement and for imparting movement thereto.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my scraper, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 is a top or plan view of the scraper embodying my invention.

Figure 2 is a side elevation of the same..

Figure 3 is a detail, sectional view taken on the line 3-3 of Figure 1.

Figure 4 is a detail, sectional view taken on the line 4 4 of Figure 2.

Figure 5 is a horizontal, detail sectional view taken on the line 5-5 of Figure 1; and

Figure 6 is a vertical, sectional view taken on the line 6--6 of Figure 1.

I provide what might be 'generally called a carriage A in which is mounted the movable bowl B. The carriage A has a. part forming what might be described as a box, having a front wall IIJ inclined downwardly and rearwardly from its upper edge, spaced side walls II and a rear wall I2. The side walls II have triangular portions II' projecting rearwardly beyond the rear wall I2 as indicated for instance in Figure 2, to provide a means for mounting the rear wheels.

Extending rearwardly from the rear wall I2 and spaced inwardly from the respective portions II' cf the side walls II are laterally spaced supports i 3, having the same general shape as the portions II.

At the right and left-hand sides of the machine at the ,rear thereof, axles I4 are journaled in the side wall portions II and the supports I3, as shown for instance in Figures 1, 2 and 6. i

On the axles I4 are wheels, preferably the dual wheels I5. l

At the front of the carriage A is a goose-neck supporting member I6, having the spaced side anges Il and the top member I8. Extending down from the upper front portion of the gooseneck support I6 is a supporting sleeve I9. An upright post 20 is journaled in the sleeve I9 to rotate on a vertical axis, and projects above the upper end of the goose-neck support I6 as indicated in Figure 2.

A cotter pin 2l may be extended through the projecting upper end of the post 20. A long bushing 22 receives the post 20 and is received by the sleeve I9. On the lower end of the post,20 is fixed a. horizontal, cylindrical member 23.

The front wheels 24 have the axle 25 to which l is fixed an upwardly opening channel 26. The cylindrical member 23 is pivoted lengthwise of its axis between the front and rear walls of the channel 26 as indicated at 2l. Laterally spaced pairs of ears 28 extend forwardly from the front wall of the channel 26.

A short tongue C comprises the downwardly opening channel 29 at its forward part and the laterally spreading rearward portion 30, which has the ears 3I journaled between the ears of the respective pairs. The side walls of the front end of the tongue are connected by an end .member 32. Rearwardly from the end member 32, the side walls of the portion 29 of the tongue C are connected by a short cross bar or partition 33. An eye-bolt 34 has its shank 35 extended rearwardly through the front wall 32 vand the cross bar 33 and has on its rear end a nut 36.

A coil spring 3l is received on the shank 35 between the cross bar 33 and the nut 36. The eye-bolt 34 may be hitchedl to a. tractor, truck or otherwise.

This frame structure may vary quite widely without departing in any way from the important features of my invention. For instance, it may have the braces 38 shown in Figure 2 and the braces 39 such as that shown in 'Figure 6. Likewise the rear wall I2 may be provided at its upper end with the apron 40, which is secured to the wall portions II' and members I3 to brace them.

I provide on the outside of the side walls I I at the top thereof and preferably welded thereto, the inwardly opening channel-shapedbracing members 4I. 'Ihis channel and brace member 4I preferably extend rearwardly beyond the wall member I2 as shown in Figures 1 and 2, and has a portion bent downwardly at its rear end -as at 42, joining with a corresponding channel for bracing the lower edge of the wall II and its extension II'.

` movement of the bowl.

A similar channel member 44 may be used to brace the upper edge of the wall portions as illustrated in Figure 2. The walls I0 and |2 form the front and rear of the dirt carrying compartment. I

Bowl and operating mechanism I will ,now describe the movable bowl and the mechanism for operating it. The bowl B has a bottom member 45 of any suitable material,

preferably sheet iron, and side members 46.

Assuming that the bottom is substantially level as shown in Figure 6, the rear edges of the 4side walls 46 are inclined from their lower ends upwardly and forwardly and the side walls 46 taper irregularly toward their forward ends as shown in Figure 6.

At the front part of the bowl, there rests on the bottom 45 the inclined cross plate 41, extending upwardly and rearwardly.` At the rear upper end of the plate 41 is a downwardly and rearwardly inclined plate 48, the lower edge of which rests on the bottom 45. 'Ihe plate 41 is covered by a wear plate 49 preferably of steel, having al sharpened lower edge as at 50. The front edge of the bottom 45 is beveled as at 5| to snugly fit the plate 49 and the lower forward edge of the plate 41 is beveled to fit against the bottom 45. The bottomf45 rearwardly of the plate 48 is covered by a relatively thick bracing cross plank 52 and above the plank 52 slightly below the level of the uppermost edge of the plate 49 is a false bottomL plate 53, preferably of sheet metal.

In the rear edges of the side walls 46 at their lower parts and in the rearward plank member 52 are notches 54, which during part of the movement of the bowl B receive and 'cooperate y'with pins 55 extending inwardly from the walls at their rearward lower parts (see Figures 1, 2 and 6).

In the'side walls 46 at their upper rear parts are slots 56, elongated on the arcs of circles, having their centers at the centers of the pins: 55.

The side wallsrrr 46 of the bowl are spaced inwardly from the side walls lof the box-like portion Iof the carriage A enough to yallow free On the inner surfaces of the side walls are the washers 51. Extending inwardly from the side walls through the washers 51 are pins 58, which project through the elongated slots 56, as shown in Figures 1, 2 and 6L and have on their inner ends the flattened heads 59.

I shall now describe`the mechanism for operating the bowl B. Above the`walls I I of the boxlike porti'on of ,the carriage A is a transverse shaft 60. The ends of the shaft 68 are journaled in brackets D.

Each bracket D has an inner vertical member 6| through which the shaft 60 extends. At the yupper part of the member 6| is a horizontal,

outwardly extending member 62 from which the member 63 extends downwardly. The member 63 receives the shaft 60.

At the lower end of the part 63 of the bracket D is an outwardly extending, horizontal part 64 restingl von top of one of the channel-shaped braces 4| and terminating in a downwardly extending part 65 at the lower end of which is: an inwardly extending part 66. 'I'he parts 64, 65 and 66 embrace the channel-shaped member 4| and slide thereon.

On theY ends of the shaft 60 which project outwardly from the portions 63 of the brackets by any suitable means, as for instance the cotter pins 68.

On the shaft 68 between the members 6| and 63 of each of the brackets D is a collar 69. From the respective collars 69 are rods 1|), which when the bowl B is in its position shown for 'instance in Figure 6, extend downwardly and forwardly and are pivoted as at 1| to the inner forward parts of the walls 46'. Thus by sliding the shaft 60 backward and forwardly on the channels 4|, as guides, the bowl B may be moved to its different operative positions.

For accomplishing this sliding `movement of the shaft and for thus actuating the bowl, any suitable means might be employed.

Mounted on the upper edges of the walls Il at the forward parts thereof and projecting forwardly therefrom are hydraulic cylinders 12 in which are the pistons 13 from which the piston rods 14 extend rearwardly through the packing structures 15 at the rear ends of the cylinders 12 to the collars 69 to which these piston rods are xed. Oil for example is supplied to the cylinders 12 for actuating the pistons 13.

Near the rear end of each cylinder 12 is a port 16 and at the forward end of each cylinder 12 is a port 11. Suitably located at any particular point as on a tractor or truck is a pump 18, preferably of the rotary type. An oil reservoir 19 is connected with the intake of the pump 18 by a pipe 89. A pipe 8| connects the outlet from the pump 19 with a valve 82.

'Ihe valve 82 which is shown somewhat diagrammatically in Figure l has passages 83 and 84. One port 85 of 'the valve 82 is connected by a pipe 86 with branch pipes 81 leading to the ports 16. Another port 88 of the valve 82 is connected by a pipe 89 with branch pipes 90 leading to the ports 11 of the cylinders 12. Still another port 9| of the valve 82 is connected to w the top of the reservoir 19 by a pipe 92. The pipe leads from the bottom of the reservoir 19. It will, of course, be understood that the pump 18 may be operated from any suit ble source of power.

Operation.

I will now describe the practical-o 'eration of my machine. Let us assume that th loo'wlB, is substantially in the position shown in Figure 6, Which is its load carrying position. In Figure 2, I have shown what is the loading position of the bowl. As a matter of fact for scraping and loading, the front end is lowered a little below its position shown in Figure 2.v In order to move the bowl from the full line position of Figure 1 to the position of Figure 2, the operator adjusts the valve 82 from a previous neutral position to the position where the passages 83 and 84 are arranged as shown in Figure 1 in full lines and starts the pump.

Oil is then forced from the reservoir into the rear ends of the cylinders 12 for forcing the pist0n 13 forwardly and sliding the brackets D forwardly.

The oil inthe front ends-of the cylinders is simultaneously allowed to flow back to the reservoir 19.

'Ihe forward movement of the brackets D and the shaft 6|) actuates the rods 18 fov'moving the aosaesa i the pins 55 are received in the notches 56 and the rods serve to hold the bowl in position.

It will also be noted that in this position of the bowl, the pins 58 areV at the forward ends of the slots 56. When the front end of the bowl is lowered toward loading position, the bowl pivots on the pins 55 and slides on the pins 58.

The parts are also so arranged that the pins 58 will limit the downward tilting movement of the front end of the bowl and thus during the loading operation when the bowl is tilted as far forwardly as possible'will cooperate with the rods 'l0 in taking the strain of the loading operation.

When the bowl is loaded, the operator adjusts the valve 82 from the full line positions of the passages 83-84 illustrated in Figure 1 to the dotted line positions there illustrated, whereupon oil will be pumped from the reservoir i9 through` the passage 84 in the pipes 89 and 90 to the forward ends of the cylinders 'I2 for thereby forcing the pistons 'i3 rearwardly.

If it is desired to carry the load to some distant point, the operator moves the valve to neutral, when the bowl has reached its load carrying position o Figure 6.

'Ihen the load may be carried .to any place desired.

'Ihe walls I8 and I2 serve to retain the dirt in the bowl B. When the scraper is hauled to the place where the load is to be discharged, the operator moves the valve 82 from its neutral position to its last-described operating position,

whereupon the pistons 13 will be driven farther rearwardly, so that the shaft 8l) slides rearwardly and the front end of the bowl is tilted upwardly.

The parts are so arranged that when the front end of the bowl is thus tilted upwardly, the bowl pivots around the pins 58 and entirely leaves the pins 55 as illustrated by the dotted line showings in Figure `6.

It will have been noted that the pins 55 are so arranged that the bowl when in load carrying position cooperates with the wall I2 for holding and carrying the dirt.

When this upward movement of the front end of the bowl from position shown in full lines in Figure 6 occurs, the bowl is moved to unloading position where its lower rear part moves away from the wall` l2 to` allow the dirt to slide out freely and easily.

There is an advantage in locating the pins 58 forwardly from the wall l2 so that this unloading swinging movement of the bowl is around the pins 58 in their location as shown. With the arrangement here disclosed, there is less danger of any of the dirt sticking in the bowl, than there would be if the bowl were pivoted around an axis closer to the wall l2 than are the pins 58.

It is obvious that many changes could be made in the construction and arrangement of the various parts of my improved scraper and it is my intention to cover by my claims any such changes or modifications as may reasonably be included within the scope of the claims and of the invention.

I claim as my invention:

1. In a scraper structure, a wheeled carriage having parts adapted to serve as the front and back walls of a dirt holding compartment, a bowl having a bottom and side walls, said bowl being mounted to swing to loading, load carrying, and unloading positions, and means for operating said bowl, said means including a shaft at the upper part of the carriage mounted to slide fore-and-aft on the carriage, laterally spaced hydraulic cylinders supported at the sides of the carriage and toward the front thereof, having pistons and having piston rods operatively connected with said shaft, means for actuating said pistons, and means for connecting the shaft with the bowl.

2. In a scraper structure, a wheeled carriage having parts to serve as front and back walls of a dirt holding compartment, a bowl mounted to swing to loading, load carrying and unloading positions, and means for operating said bowl, said means including a transverse shaft, brackets for slidably mounting the ends of said shaft on said carriage, rods pivoted to said shaft adjacent the ends thereof and to the front portion of said bowlband means for sliding the shaft forwardly and rearwardly.

wall, and means for swinging the front end of the bowl, whereby when the bowl is swung from load carrying position to loading position it pivots on said last-named pivots and when it is swung from load carrying position to unloading position it `pivots on the first-named pins.

4. In a scraper structure, a wheeled carriage having sidewalls and parts 'adapted to serve as frontand back walls of a dirt holding compartment, channel-shaped bracing and guide members secured horizontally to the upper parts of said side walls, a transverse shaft, brackets slidably mounted on said channels for fore-and-aft sliding movement, brackets serving as journaling means for the ends of the shaft, means for sliding the shaft rearwardly and forwardly, a bowl,

rodsl pivoted to the shaft and to the front part of the bowl, means for pivoting the rear part of the bowl for movement between load carrying and loading position, pivots for the upper rear partv of the bowl spaced forwardly from such rear wall, said bowl having portions slidable on said last-named pivots.

5. In a scraper, a frame, having walls to serve as front and back of a dirt holding compartment, a bowl for cooperating with such walls, and adapted to be swung to loading, load carrying and load discharging position, means for transversely pivoting the bowl at its lower rear part during its movement between loading and load carrying positions, and means for transversely pivoting the bowl on an axis spaced forwardly from its upper rear part, during movement between load carrying and lo'ad discharging position.

6. In a scraper structure, a wheeled carriage having parts adapted to serve as the front and back walls of a dirt hOldingcOmpartment, and having side walls, a bowl having a bottom and side walls, said bowl being mounted to swing to loading, load carrying, and unloading positions, F said bowl having notches in the lower rear parts of its side walls, pinsprojecting inwardly from, 

